Hosta Blue Mammoth Plants

Hosta 'Blue Mammoth' is a stunning, large-growing hosta prized for its impressive, heavily corrugated blue-green foliage. A sport of the popular Hosta 'Blue Angel', this variety produces thick, heart-shaped leaves that form a bold, architectural mound, making it a striking focal point in any shaded border or woodland garden. The substantial leaf thickness provides excellent natural resistance to slug and snail damage.

In summer, tall stems emerge bearing clusters of pale lavender to near-white, bell-shaped flowers that attract pollinators to the garden. As one of the larger hosta varieties available, Blue Mammoth delivers real impact when planted in shaded beds, beneath trees, alongside water features or in large containers.

Each plant is supplied as a well-established 17cm/2 litre root ball, ready to plant directly into your garden or a suitable container.

What's Included:

• 1 x Hosta 'Blue Mammoth' plant in a 17cm/2 litre root ball

Cultural Information:

• Botanical Name: Hosta 'Blue Mammoth'


• Common Names: Blue Mammoth Hosta, Plantain Lily


• Classification: Herbaceous Hardy Perennial


• Fully Grown Height and Spread: Up to 90 cm x 120 cm


• Growth Habit: Clump-Forming, Mound-Shaped Perennial


• Perfect For: Shaded Borders, Woodland Gardens, Under Trees, Large Containers, North-Facing Beds


• Flowering Time: Summer (pale lavender to near-white bell-shaped flowers)


• Planting Position: Partial Shade to Full Shade


• Soil Type: Moist, Well-Drained, Humus-Rich Soil


• Attracts: Bees and Other Pollinators


• Type: Hardy Herbaceous Perennial


• Foliage: Large, Thick, Heavily Corrugated Blue-Green Heart-Shaped Leaves


• Hardiness: Fully Hardy (suitable for most UK gardens)


• Special Features: Good natural slug resistance due to thick leaf texture; RHS Award of Garden Merit recipient

Planting and Care Tips:

• Plant in a sheltered, shaded or partially shaded position for the best blue leaf colour.


• Avoid planting in full sun, as this may scorch the foliage and diminish the blue colouring.


• Enrich the planting area with organic matter such as compost or well-rotted manure.


• Water regularly during dry spells, particularly during the first growing season.


• Apply a mulch around the base in spring to retain moisture and suppress weeds.


• Divide established clumps in spring or autumn to maintain vigour or create new plants.

Notes: This plant is supplied in the Blue Mammoth variety, featuring distinctive blue-green corrugated foliage. As with all hostas, leaf colour may vary slightly depending on growing conditions and seasonal changes.

Free UK Delivery on Every Order

All orders placed Monday–Thursday before 2pm are packed the next working day and delivered within 24 hours of dispatch.

Example: Order on Monday → packed Tuesday → delivered Wednesday.

Orders placed Friday–Sunday are packed and shipped on Monday. We don't dispatch on weekends to ensure your plants travel fresh.

How Your Plants Arrive
Every plant is individually wrapped in our plastic-free packaging and secured in a custom box designed to keep them upright and protected in transit. If anything arrives damaged, get in touch — we'll replace it.

Returns
Not happy? Contact us within 14 days of delivery and we'll sort it out. See our full returns policy here.